Time-resolved luminescence spectroscopy is described for high Tc YBa2Cu3O7-x under 8 ps/530 nm laser ablation. The emission spectrum covered most of the visible spectrum and showed emission lines from ions. The emission profiles in time consist of fast (â‰Š25 ps) and slow (â‰Š1 ns) decay components.

Experimental demonstration of reduction in the number and size of particulates formed in the laser ablation deposition of YBa2Cu3O7-Î´ thin films is obtained by the use of a second laser which further heats and fragments the blowoff material in the plume formed by the first laser. This results...

We discuss the results of a study on the growth by laser ablation of YBa2Cu3O7 thin films on polycrystalline and annealed vicinal (001) MgO substrates. In both instances the films were found to grow predominantly with the c axis normal to the plane of the substrate, regardless of the orientation...

We have grown superconducting films on the technologically important sapphire substrates by CO2 pulsed laser ablation from fully superconducting targets of Bi2Sr3-xCaxCu2Oy followed by appropriate post-annealing. The composition of the films was found to deviate slightly from the target....

Superconducting Bi-Ca-Sr-Cu-O and Bi-Pb-Ca-Sr-Cu-O films were grown in situ by excimer laser ablation from pressed powder and sintered superconducting targets, respectively. The substrate temperature during deposition was found to be important to obtain a maximum transition temperature. Both 110...

Broad angular distributions have been observed for XeCl laser ablation plumes used in the deposition of YBa2Cu3O7-Î´ thin films. Distributions (inferred from film thickness) and film stoichiometry were measured as a function of laser fluence, beam shape, and oxygen pressure. Parallel to the...

The article examines the microstructure and chemical composition of the YBa2Cu3O7-x films deposited by the laser ablation technique using scanning electron microscopy. The films were evaporated using synchronous sputtering of the hot-pressed cylindrical samples made from the high temperature...

We report an experimental approach to making multifilament coated conductors with low losses in applied time-varying magnetic field. Previously, the multifilament conductors obtained for that purpose by laser ablation suffered from high coupling losses. Here we report how this problem can be...

Room-temperature laser-induced voltages were observed in unsupported, polycrystalline wafers of YBa2Cu3O7-x in the absence of a transport current. Peak voltages of âˆ¼1 V were detected in response to 40 mJ pulses of 532 nm light. The rise and fall times for the signals were detector limited....

Single crystals of Ba2YCu3O7-Î´ were prepared from melts of a BaO-Y2O3-CuO mixture and characterized by the x-ray microprobe analyzer and x-ray diffraction. Electrical resistivity was measured by the standard four-terminal method. Some crystals have the critical temperature above 77 K. After...